“I can’t think it was a woman,” I said. “Although the shadow was indistinct, it struck me as that of a man, the motions and attitudes were masculine, as I recall them. The hatpin may have been left here this morning or any time.”

“The visitor must be found,” declared Mr. Talcott, “but I don’t know how to go about it.”

“Ask the elevator girls,” I suggested; “one of them must have brought the caller up here.”

We did this, but the attendants of the three elevators all denied having brought anyone up to Mr. Gately’s offices since the old man and the elderly lady who had been mentioned by Jenny.

Miss Raynor had been brought up by one of the girls also, but we couldn’t quite ascertain whether she had come before or after the other two.

While waiting for Miss Raynor to come again, I tried to do a little scientific deduction from any evidence I might notice.

But I gained small information. The desk-blotter, inkwell, and pens were in immaculate order, doubtless they were renewed every day by a careful attendant. All the minor accessories, such as paperweights and letter openers were of individual styles and of valuable materials.

There was elaborate smoking paraphernalia and a beautiful single rose in a tall silver vase.

“Can you read anything bearing on the mystery, Mr. Brice,” asked Talcott, noting my thoughtful scrutiny.

“No; nothing definite. In fact, nothing of any importance. I see that on one occasion, at least, Mr. Gately kept a chauffeur waiting an unconscionably long time, and the man was finally obliged to go away without him.”